Lining Under I-40 in Albuquerque, NM

Additionally, the contractor would not have to perform pre-lining point repairs or remove obstructions to install SPR™EX. More importantly, since setting up a bypass pumping system on the freeway proved to be impossible, SPR™EX, which can be installed in live flow, was the most cost effective solution. 

Southwest Sewer Service Inc., AUI’s subcontractor, spent weeks cleaning these pipelines to remove years of debris and grease build up. Mechanical cleaning equipment was used to clean the sewer line with a series of chain cutters to break up the tuberculation inside the pipeline and then the lines were jetted just prior to the SPR™EX liner being installed.

However, once the lining had begun, it was determined that the as-builts provided had incorrectly identified the diameters of the host pipes. Instead of having 21” and 24” pipelines, the sewers were actually 18” and 21” respectively. With any rehabilitation method, this would have meant a costly change order with new pipe liners having to be ordered. However, with SPR™EX, AUI, Inc. was able to make on site corrections by downsizing the winding cage and installed a smaller diameter liner for both pipe segments. The end result was a structural liner that met the agency’s hydraulic capacity requirements on time and on budget despite the changed conditions.